#4547 - Cannot create long-distance relation in PDF editor

- Added support for context menu in PDF editor

inception/inception-pdf-editor2/src/main/ts/src/PdfAnnotationEditor.ts

@@ -28,10 +28,16 @@ export class PdfAnnotationEditor implements AnnotationEditor {
     this.ajax = ajax
     this.root = element
 
-    element.addEventListener('annotationSelected', ev => this.onAnnotationSelected(ev))
-    element.addEventListener('createSpanAnnotation', ev => this.onCreateSpanAnnotation(ev))
-    element.addEventListener('createRelationAnnotation', ev => this.onCreateRelationAnnotation(ev))
-    element.addEventListener('doubleClickAnnotation', ev => this.onDoubleClickAnnotation(ev))
+    // Prevent right-click from triggering a selection event
+    this.root.addEventListener('mousedown', e => this.cancelRightClick(e), { capture: true })
+    this.root.addEventListener('mouseup', e => this.cancelRightClick(e), { capture: true })
+    this.root.addEventListener('mouseclick', e => this.cancelRightClick(e), { capture: true })
+
+    this.root.addEventListener('annotationSelected', ev => this.onAnnotationSelected(ev))
+    this.root.addEventListener('createSpanAnnotation', ev => this.onCreateSpanAnnotation(ev))
+    this.root.addEventListener('createRelationAnnotation', ev => this.onCreateRelationAnnotation(ev))
+    this.root.addEventListener('doubleClickAnnotation', ev => this.onDoubleClickAnnotation(ev))
+    this.root.addEventListener('openContextMenu', ev => this.onOpenContextMenu(ev))
   }
 
   async init (): Promise<void> {
@@ -47,6 +53,27 @@ export class PdfAnnotationEditor implements AnnotationEditor {
     scrollTo(args)
   }
 
+  private cancelRightClick (e: Event): void {
+    if (e instanceof MouseEvent) {
+      if (e.button === 2) {
+        console.log("cancelled")
+        e.preventDefault()
+        e.stopPropagation()
+      }
+    }
+  }
+
+  onOpenContextMenu (ev: Event) {
+    if (ev instanceof CustomEvent) {
+      const ann = ev.detail.ann as AbstractAnnotation
+      const oev = ev.detail.originalEvent
+
+      if (!(oev instanceof MouseEvent) || !(oev.target instanceof Node)) return
+
+      if (ann.vid) this.ajax.openContextMenu(ann.vid, oev)
+    }
+  }
+
   onAnnotationSelected (ev: Event) {
     if (ev instanceof CustomEvent) {
       const ann = ev.detail as AbstractAnnotation

inception/inception-pdf-editor2/src/main/ts/src/pdfanno/core/src/model/AbstractAnnotation.ts

@@ -100,7 +100,7 @@ export default abstract class AbstractAnnotation extends EventEmitter {
   }
 
   /**
-   * Handle a click event.
+   * Handle a left-click event.
    */
   handleSingleClickEvent (e: Event) {
     if (this.element) {
@@ -110,6 +110,23 @@ export default abstract class AbstractAnnotation extends EventEmitter {
     }
   }
 
+  /**
+   * Handle a right-click event.
+   */
+  handleRightClickEvent (e: Event) {
+    if (this.element && e instanceof MouseEvent) {
+      // If the user shift-right-clicks, open the normal browser context menu. This is useful
+      // e.g. during debugging / developing
+      if (e.shiftKey) return
+
+      e.preventDefault()
+
+      const event = document.createEvent('CustomEvent')
+      event.initCustomEvent('openContextMenu', true, true, { ann: this, originalEvent: e})
+      this.element.dispatchEvent(event)
+    }
+  }
+
   /**
    * Handle a hoverIn event.
    */

inception/inception-pdf-editor2/src/main/ts/src/pdfanno/core/src/model/RelationAnnotation.ts

@@ -31,6 +31,7 @@ export default class RelationAnnotation extends AbstractAnnotation {
 
     // Need to bind these event handler methods
     this.handleSingleClickEvent = this.handleSingleClickEvent.bind(this)
+    this.handleRightClickEvent = this.handleRightClickEvent.bind(this)
     this.handleHoverInEvent = this.handleHoverInEvent.bind(this)
     this.handleHoverOutEvent = this.handleHoverOutEvent.bind(this)
 
@@ -220,18 +221,21 @@ export default class RelationAnnotation extends AbstractAnnotation {
     super.enableViewMode()
 
     if (!this.readOnly) {
-      this.element?.querySelectorAll('path').forEach(e =>
-        e.addEventListener('click', this.handleSingleClickEvent))
-    }
+      this.element?.querySelectorAll('path').forEach(e => {
+        e.addEventListener('click', this.handleSingleClickEvent)
+        e.addEventListener('contextmenu', this.handleRightClickEvent)
+    })}
   }
 
   /**
    * Disable view mode.
    */
   disableViewMode () {
     super.disableViewMode()
-    this.element?.querySelectorAll('path').forEach(e =>
-      e.removeEventListener('click', this.handleSingleClickEvent))
+    this.element?.querySelectorAll('path').forEach(e => {
+      e.removeEventListener('click', this.handleSingleClickEvent)
+      e.removeEventListener('contextmenu', this.handleRightClickEvent)
+    })
   }
 
   /**

inception/inception-pdf-editor2/src/main/ts/src/pdfanno/core/src/model/SpanAnnotation.ts

@@ -30,6 +30,7 @@ export default class SpanAnnotation extends AbstractAnnotation {
 
     // Need to bind these event handler methods
     this.handleClickEvent = this.handleClickEvent.bind(this)
+    this.handleRightClickEvent = this.handleRightClickEvent.bind(this)
     this.handleHoverInEvent = this.handleHoverInEvent.bind(this)
     this.handleHoverOutEvent = this.handleHoverOutEvent.bind(this)
 
@@ -117,6 +118,7 @@ export default class SpanAnnotation extends AbstractAnnotation {
     this.element?.querySelectorAll('.anno-knob').forEach(e => {
       e.addEventListener('mousedown', this.preventFocusChange)
       e.addEventListener('click', this.handleClickEvent)
+      e.addEventListener('contextmenu', this.handleRightClickEvent)
     })
   }
 
@@ -162,6 +164,7 @@ export default class SpanAnnotation extends AbstractAnnotation {
     super.disableViewMode()
     this.element?.querySelectorAll('.anno-knob').forEach(e => {
       e.removeEventListener('click', this.handleClickEvent)
+      e.removeEventListener('contextmenu', this.handleRightClickEvent)
       e.removeEventListener('mousedown', this.preventFocusChange)
     })
   }